This cancer usually starts in another organ and then spreads to the abdominal lining. Learn about symptoms and treatment options, including newer approaches that may offer more hope.
Find out what to do when symptoms such as headache, fatigue and dizziness last longer than expected after an injury causes a concussion.
Disease
Pilonidal cyst
Learn about causes, symptoms and treatments of this painful condition that usually affects the skin above the tailbone in people who sit for long periods.
Disease
Pink eye (conjunctivitis)
This highly contagious eye condition can be itchy and uncomfortable. But much like the common cold, it rarely requires medicine or staying home.
Disease
Posterior cortical atrophy
This rare neurological syndrome that's often caused by Alzheimer's disease affects vision and coordination.
Disease
Premature ventricular contractions (PVCs)
PVCs are extra heartbeats that can make the heart beat out of rhythm. They are very common and may not be a concern. Learn when treatment is needed.
Disease
Primary biliary cholangitis
Primary biliary cholangitis is a type of liver disease that damages the bile ducts. Early recognition and treatment may help prevent complications.
Disease
Primary sclerosing cholangitis (PSC)
Scarring in the bile ducts blocks the flow of bile from the liver and damages liver tissue. A liver transplant is the only known cure.
Disease
Prostate cancer
Learn about detection, diagnostic approaches, treatment options and advances for prostate cancer, including robotic prostatectomy and current research.
Disease
Prostate cancer recurrence
Rising PSA after prostate cancer treatment may signal recurrence. Learn how it's diagnosed, what it means, treatment options and outlook.
Disease
Pseudomembranous colitis
This condition causes serious or life-threatening diarrhea. It often follows antibiotic use and often affects people in the hospital for other conditions.